If a child has reached the level of puberty in terms of bone age or age without corresponding manifestation of secondary sexual characteristics, it is called delayed pubertal development. For example, if a girl does not have breast development or vulvar changes at the age of 11 or 12 weeks, or if a boy does not have an enlarged penis or testicles or a darkened, flaccid scrotum at the age of 12 or 13 weeks, this is considered delayed puberty. Outpatient clinics are often visited for small penis, which is not really small, but may be excessive obesity and penis hidden below the pubic symphysis. Therefore, to diagnose whether it is pubertal growth retardation, it is recommended to go to the hospital for medical examination and diagnosis by a professional doctor.